METHOD AND DEVICE FOR OVERALL-SHAPING WORK WHICH IS FORMED TO DIE SHAPE AND USED AS MATRIX OR PATRIX

摘要

1. A machine for the shaped grinding of workpieces (2) constructed after the fashion of dies and usable as male or female dies, more particularly graphite electrodes for the spark erosion processing of workpieces, having : a shaped grinding tool (10) matching the shape to be produced on the workpiece (2) but somewhat smaller in dimensions, which can lowered rectilinearly on to the workpiece (2) ; a carrier (9) for the shaped grinding tool (10) and a carrier (1) for the workpiece (2) ; a drive (8) for the lowering element and a drive taking the form of a crank mechanism (12) for a circular movement of the workpiece carrier (1) guided bidimensionally in a plane perpendicular to the lowering direction, the radius of the circular path being adjustable by means of a crank pin (14) of the crank mechanism (12), characterized in that the axis of the crank pin (14) extends at an angle different from 0 or 180 in relation to the axis of the crank shaft (11), the crank pin (14) can be displaced in the carrier (1) in the direction of its axis, and the crank shaft (13) can be adjusted in the direction of its axis.